Next Generation Attenuation for Central and Eastern North America (NGA-East)
SSHAC Workshop 3C – Proponent Discussions and Feedback Analyses
June 17-18, 2015
The focus of this 1.5 day workshop was on the TI Team Ground Motion Characterization model. Handouts available for download:
- Intro slides (new to SSHAC? If so, download this set of slides!)
- GMM table: summary listing of the NGA-East median ground-motion models
- Epistemic flowchart: process for the quantification of epistemic uncertainty in median ground motions
PDFs of all presentations
Presentations usually involve numerous researchers and contributors. Only the name of the presenter is listed below.
June 17, 2015 Wednesday
| 09:00-09:05 | Opening remarks (Y. Bozorgnia) |
| 09:05-09:20 | Introduction and project status (C. Goulet) |
| 09:20-09:30 | Median ground motions: methodology flowchart (C. Goulet) |
| 09:30-10:00 | Median ground motions: overview of GMM evaluation (R. Graves) |
| 10:00-10:30 | Median ground motions: distance extrapolation of GMMs (R. Youngs) |
| 10:30-11:00 | Median ground motions: continuous distributions of GMMs (N. Kuehn) |
| 11:00-11:15 | Break |
| 11:00-12:00 | Median ground motions: visualization of the ground-motion space and re-discretization (N. Kuehn) |
| 12:00-12:30 | Discussions |
| 12:30-13:30 | Lunch |
| 13:30-14:15 | Median ground motions: assigning weights (N. Kuehn) |
| 14:15-14:45 | Discussions |
| 14:45-15:00 | Break |
| 15:00-16:15 | Standard deviations of ground motions: models and weights (L. Al Atik) |
| 16:15-16:45 | Discussions |
| 16:45-17:00 | Summary of the day (TI team) |
| 17:00-17:15 | Observers comments |
June 18, 2015 Thursday
| 08:30-08:35 | Introduction (C. Goulet) |
| 08:35-09:55 | Adjustment models: Gulf Coast region (C. Goulet) |
| 09:05-09:30 | Adjustment models: source-depth effects (D. Boore) |
| 09:30-10:00 | Adjustment models: source-depth effects Model Centering (C. Goulet) |
| 10:00-10:20 | Adjustment models: hanging-wall effects (R. Youngs) |
| 10:20-10:45 | Break |
| 10:45-11:30 | Hazard feedback analyses: results for NGA-East (R. Youngs) |
| 11:30-11:50 | Ground Motion Characterization model: a summary (C. Goulet) |
| 11:50-11:55 | Summary of the day (TI Team) |
| 11:55-12:00 | Observers comments |
| 12:00-12:05 | Closing remarks (Y. Bozorgnia) |
Project information
With funding from the US Nuclear Regulatory Commission (NRC), Electric Power Research Institute (EPRI) and US Department of Energy, the Pacific Earthquake Engineering Research Center (PEER) is coordinating a comprehensive multidisciplinary program to develop Next Generation Attenuation Relationships for the Central and Eastern North-America (NGA-East).
NGA-East is Ground Motion Characterization (GMC) project and follows the SSHAC (Senior Seismic Hazard Analysis Committee) Level 3 process. See the Open-File Report 2009-1093 (PDF file – 992 KB) for a summary of the SSHAC process.